[junus89]

I want to ask how does the rft indicator work? When i let my one tyre without pressure and i drive my car in high speed my rft idicator didn't warning me? do anyone ever try this? :mad:

[joohdunnoh]

That is weird. RFT should come on when a tire is low on pressure or when you have a noticeable nail.

[MB330]

Originally Posted by junus89

I want to ask how does the rft indicator work? When i let my one tyre without pressure and i drive my car in high speed my rft idicator didn't warning me? do anyone ever try this? :mad:

YOu first need setup RFTI.

[junus89]

Originally Posted by NIVKI89

YOu first need setup RFTI.

How to setup RFT? thanks

[MB330]

Originally Posted by junus89

How to setup RFT? thanks

RTFM page 88

Flat Tire Monitor FTM
The concept
The Flat Tire Monitor monitors tire pressures
while the car is being driven. The system
reports any significant loss of pressure in one
tire in relation to another.
If a tire loses pressure, its rolling radius
changes, and this in turn alters the speed of
rotation. This change is detected and is
reported as a flat tire.
Functional requirement
In order to assure the reliable reporting of a flat
tire, the system must be initialized for the correct
tire inflation pressure.
The system must be reinitialized each
time a tire inflation pressure has been corrected
or a wheel or tire has been changed.<
System limitations
The Flat Tire Monitor is unable to warn
the driver of sudden, severe tire damage
caused by external factors, nor can it identify
the gradual loss of pressure that will inevitably
occur in all four tires over a lengthy period of
time.<
In the following situations, the system could be
delayed or malfunction:
> System has not been initialized
> Driving on snowy or slippery road surface
> Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration
> If snow chains are attached
Initializing the system
The initialization is completed during driving,
which can be interrupted at any time.
When driving resumes, the initialization is continued
automatically.
Do not initialize the system while snow chains
are attached.<
iDrive concept, refer to page 16.
1. Press the button.
This opens the start menu.
2. Press the controller to open the menu.
3. Select "Vehicle settings" and press the
controller.
4. If necessary, move the highlight marker to
the uppermost field. Turn the controller
until "FTM" is selected and press the controller.
5. Start the engine, but do not start driving.
6. Select "Set tire pressure" and press the
controller.
7. Select "Yes" and press the controller.
8. Start to drive.
"Status: FTM active" reappears in the Control Display. Initialization is then completed
while the car is in motion.
Indication of a flat tire
The warning lamps come on in yellow
and red. A message appears on the
Control Display. In addition, an
acoustic signal sounds. There is a flat
tire or substantial loss of tire pressure.
1. Cautiously reduce speed to below 50 mph
or 80 km/h. Avoid sudden braking and
steering maneuvers. Do not exceed a speed
of 50 mph or 80 km/h.
If the car is not equipped with Run-
Flat Tires, refer to page 196, the standard
equipment by design, do not continue
driving. Otherwise a severe accident could
result after a tire puncture.<
2. At the next opportunity, check the air pressure
in all four tires.
If all four tires are inflated to the correct
pressures, the Flat Tire Monitor
might not have been initialized. The system
must then be initialized.<
3. In the event of complete tire pressure loss,
0 psi/0 kPa, you can estimate the possible
distance for continued driving on the basis
of the following guidelines:
> With a light load:
1 to 2 persons without luggage:
approx. 155 miles/250 km
> With a medium load:
2 persons, luggage compartment full, or
4 persons without luggage:
approx. 90 miles/150 km
> With a full load:
4 or more persons, luggage compartment
full:
approx. 30 miles/50 km
Drive cautiously and do not exceed a
speed of 50 mph or 80 km/h. In the event
of pressure loss, vehicle handling changes. This
includes reduced tracking stability in braking,
extended braking distance and altered natural
steering characteristics.